Sleeve puller



Nov. 13, 1923.

E. B. CANTRELL ET AL SLEEVE FULLER IN VENTORS. f. 5. CHNTRELL mva W ATTORNEYS Filed Sept. 30 1920 Patented Nov. 13, 1923.

cornice.

EDWIN B. CANTRELL, OF SAN FRANCISCO, AND GEORGE E. MILLER, O15

OAKLAND,

CALIFORNIA.

SLEEVE FULLER.

Application filed September To all whom it may concern Be it known that we, EDWIN B. CANTRELL and GEORGE E. MILLER, citizens of the United States, and respectively residents of the city and county of San Francisco, and of the city of Oakland, county of Alameda, both in the State 01 California, have invented certain new and useful Improvements in Sleeve Pullers, or which the following is a specification.

This invention relates to handy devices for readily removing bushings or sleeves from their casings or housings.

It is the general practice, at present, to utilize a comparatively thin sleeve or bearing to form a liner or bushing in vehicle and machine structures between relatively rotary elements of the structures so that wear may be compensated for by readjustment of the sleeves or bushings and so that when necessary they may be replaced by new bushings. A common type of bearing or bushing sleeve is made of thin resilient metal of tubular form longitudinally split and which is designed to be held in its casing or housing against rotation, the bushing usually being provided with an aperture for the reception of a tool by which the bushing may be extracted or pulled from its casing or housing; 30 the flexibility of the split sleeve permitting it to flex inwardly to disengage its retaining means in the casing or housing. Various types of removable bushing sleeves are in common use, some of which have a puller aperture adjacent one end to receive a part of the pulling tool, and this type of sleeve is provided with an embossed or otherwise formed exterior protuberance to engage with a shoulder forming portion in the casing or housing. Another type of removable bushing is now made in which the retaining protuberance is in the form of a concaveconveX embossment and this is perforated centrally to receive a complementary part of a pulling tool.

It is an object of the present invention to provide a simple, practicable, substantial, and comparatively inexpensive, eflicient pulling tool that may be universally applied for the extraction of mounted bushing sleeves.

It is a further object of the present invention to provide a tool having means for effectually operating to engage the perforated embossment of a form of sleeve now used and to provide for the relative yielding of 1920. Serial No. 413,849.

the engaged portion of the sleeve as it leaves the retaining means in the casing or housing.

A further object of the invention is to provide a pulling device or tool having means cting substantially automatically to snap into interlocking or registering position with the edge oi a perforation in the sleeve to be pulled.

provide a pulling tool with.

it is a further object of the invention to I D that may be applied taclhty to various types of bushing sleeves and which has means for indicating the approznmate proper position of the 'ot the tool while the engaging means may be within the bushing.

Theinvention possesses other objects and features of advantage, some of which, with the ioregoing, will be made manifest in the ollowing description of the preferred form of the invention which is illustrated in the drawings accompanying and formlng part of the specification.

It is to be understood that it is not intended to limit the invention to the embodiment shown by the said drawings and description as variations may be adopted within the scope of the invention as set forth in the claims.

Referring to the drawings:

Fig. l is a side elevation of the improved leeve pulling tool.

Fig. 2 is a side elevation partly in section showing the tool applied.

Fig. 3 is a cross section on line 3-3 of Fig. 2.

Fig. 4 is a side elevation illustrating in dea1l one form of a sleeve hook.

Fig. 5 is a cross section on line 5-5 of Fig. 4.

Fig. 6 is a side elevation of a slightly modified form of sleeve hook.

Fig. 7 is a side elevation of a form of hook tormed integral with a spring bar and illustrating a mode of application.

Fig. 8 is a detail sectional view of a portion of the sleeve and its housing showing the sleeveengaged by the hook preliminary to extracting.

F1 9.. 9 is a detail sectional view, similar to 1g. 8. showing the extraction of the sleeve rom its locking recess.

Fig. 10 is a perspective of a form of bearing sleeve.

The present invention may be embodied in various types of structures and comprises a body organization having a head portion that is readily insertable into a sleeve, as S, Fig. 10, to be pulled from its housing or casing, as H, which in the present case rep resents a portion of a drive axle housing through which there extends a drive axle A between which and the sleeve S, inserted in the housing, there is adapted to be interposed an anti-friction bearing that has been withdrawn from the sleeve to permit the insertion of the sleeve pulling tool to facilitate the removal of the sleeve. As above stated, the sleeves S are of various types of construction, some of which have locking protuberances on one side or portion and at another side or portion an aperture to receive a part of the pulling tool. The sleeve illustrated is longitudinally split and has intermediate its ends an outwardly extendin embossment forming a collar or shoulder that is centrally perforated, as at P. There fore, this type of sleeve has its retaining means and its perforation in juxtaposition or mmbined relation. (i hen the sleeve S is pushed into the housing H, the collar C springs up Jardly into the inner end of an oil hole 0, thus retaining the sleeve against longitudinal and circumferential movement.

To remove this type of sleeve, a pulling tool is provided with means to project outwardly into the perforation P of the sleeve and which means is adapted to yield inwardly with the engaged portion of the sleeve when, owing to the abutment formed by the edge of the hole 0, the sleeve is sprung inwardly as it is also shifted axially. The improved tool, while particularly adaptable for interlocking engagement with the edge of, the embossment or collar C of the sleeve, is also universally serviceable to extract other types of sleeves.

In the illustrated embodiment, the tool body structure is shown as of cage-like organization formed by a plurality of sub stantial, parallel, longitudinally extending rods 2, the ends of which are securely mounted in a substantial head forming part in the form of a collar 3 while the opposite end of the cage rods are secured firmly in a disc t centrally perforated to receive jack screw 5, the inner end of which is adaptcd to be forced against the adjacent outwardly extending end of the axle A. The screw 5 may be provided with any means to facilitate its rotation as, for instance, a crank 6. The head 3 is preferably of materially less diameter than the interior diameter of the sleeve S to be removed, so that the engaged portion of the sleeve may spring inwardly as the collar C thereof clears the bottom of the hole 0. The interior bore or hole in the annular head 3 is preferably eccentric to the circumference of the head so as to be concentric, or substantially concentric, to the axle A overwhieh the head is passed as it is inserted into the sleeve S; the lower part of the head 3 bearing upon the lower surface of the sleeve.

To facilitate the interengagement of a pulling part, with which the head is provided, with the sleeve, it is preferred that the pulling part be of an automatic action and be capable of ready withdrawal from the engaged portion of the sleeve, if de sired, and at the same time it is desirable to secure a firm and substantial non-slipping interlock between the sleeve and the pulling part with which the head is provided. In Figs. 16 inclusive the head is shown as provided with a pulling device in the form of a cylindrical plug or pin 7 radially movable in a radial aperture 8 from which there extends laterally a slot 9 terminating within the circumference of tire head 3. This plug 7 has its outer end provided with a neck 10 which, in Figs. 4 and 5, is shown as undercut or notched, as at 11, to provide an overhanging lip 12 and thus form a substantial seat or hook-like portion to engage the edge of the collar (l of the sleeve when the plug 7 is shifted outwardly until the notched portion 11 of the neck is in register with the adjacent edge of the collar. When so engaged, the longitudinal movement of the head 3 will effect the substantial interlock of the sleeve with the hook and the engaged portion of the sleeve will be flexed inwardly by reason of the curvature of the embossed collar G as it engages the edge of the opening 0. r

The hooked plug 7 is preferably yieldingly supported'and automatically projected to its outermost or normal engaging position by any suitable means and is preferably readily disengage-able while the head is still inserted, if necessary. A simple device for the operation of the plug 7 comprises a spring rod 13 extending longitudinally and having one end movably mounted in the inner end of the plug 7 and which end is adapted to play in the radial slot 9 of the head 3 as the end of the spring rod 13 may be pressed inwardly to retract the hooked portion of the plug and enable its entry into the sleeve S. The opposite end of the spring rod 18 is securely fixed in the flange of the disc e; the rod being disposed longitudinally substantially between a pair of the cage bars 2-2, as shown in Fig. 1, and thus providing for the ready application of the finger of the operator to the yieldable end of the spring rod 13, so that the hook plug may be retracted. If desired, the spring rod may be supported intermediate its ends by a bridge 1 1 mounted transversely upon the contiguous bars 2 of the cage structure between which the spring rod 13 may extend.

A slightly modified form of the hooked plug is shown in Fig. 6, in which the neck 10 is provided with a continuous circumferential groove 11 thus forming a circumterential head 12, while in Fig. 4 the neck lO-is notched only on one side which is so disposed in the head 3 of the too as to face outwardly when inserted in the sleeve 3.

In Fig. 7 a form of the sleeve engaging device is shown as comprising a spring rod l3 having a hooked part 7 formed integrally therewith.

In Figs. 8 and 9 the method of application of the tool to the sleeve and the extraction of the sleeve are clearly illustrated.

From the above, it will be seen that when the hook portion of the tool is slightly retacted upon entering into the sleeve S, it may then be released and will spring outwardly against the surface of the sleeve so that when the tool head 3 has been shifted inwardly to bring the hook plug 7 into register with the oil hole 0, then the hooking part will snap automatically outwardly into the perforation P of the collar G, whereupon when the screw 5 is rotated inwardly against the acent end of the axle A, further rotation provides ample power for causing the end of the sleeve S, that is engaged at the collar C by the hook, to be sprung inwardly by the reaction of the edge of the hole concurrently with which the hook member 7 will yield while still in engagement with the edge of the collar; the continued rotation of the screw 5 serving to pull the sleeve from its housing H. The register of the hook member 7 with the perforation P is indicated by a guide or index independent of the puller, for facilitating extraction of the sleeve, and spring means for automatically projecting the interlocking means.

2. A sleeve puller having a body structure including a head, insertable into the sleeve to be pulled, a sleeve hooking member movably mounted in the head, and a device yieldingly actuating the said mem her, said member and device being relatively movable.

3. A sleeve puller having a body structure including a head end, insertable into the sleeve to be pulled, provided with a snap member to engage a shoulder-like part of the sleeve and means for disengaging the snap member from the sleeve and by which it is moved to inoperative position preliminary to insertion of the head into the sleeve, and an index for facilitating the positioning of the hooking member.

4. A device for pulling sleeves from their casing, having a head insertable into the sleeve to be pulled and provided with hook means to engage the sleeve at a given part thereof; and means for indicating to the operator when the said means approximately registers with said part.

In testimony whereof we have hereunto set out hands.

EDWIN B. CANTRELL. GEORGE E. MILLER. 

